JP2002066401A - Fluid delivery pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fluid delivery pump which can effectively prevent the corrosion or dissolution of a coil spring. SOLUTION: This fluid delivery pump 1 is equipped with a piston 83 which can reciprocate in a cylinder 23; first and second hollow linking tubes 81, 82 which link a nozzle head 2 with a piston 22 to transmit a pressing force applied to the nozzle head 2 to the piston 83 for pushing down the piston 83; a coil spring 24 placed around the first and second linking tubes 81, 82 for enhancing the movement of the piston 83 in the upward direction; a first valve mechanism 86 which causes a fluid stored in a fluid storage section 4 to flow into the cylinder 23 when the piston 83 moves upward; and a second valve mechanism 87 which causes the fluid flowing into the cylinder 23 to flow into the nozzle head 2 through the insides of the first and second linking tubes 81, 82 when the piston 83 moves downward.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid discharge pump for discharging a fluid stored in a fluid storage section from a nozzle head by pressing a nozzle head.

[0002]

2. Description of the Related Art As such a fluid discharge pump,
Conventionally, a nozzle head for discharging a liquid, a liquid storage portion for storing the liquid, a cylinder disposed above the liquid storage portion, and a piston that can reciprocate in the cylinder by pressing the nozzle head And an inflow valve mechanism for causing the liquid stored in the liquid storage unit to flow into the cylinder with the upward movement of the piston, and for flowing the liquid flowing into the cylinder to the nozzle head with the downward movement of the piston. And an outflow valve mechanism.

[0003]

In such a conventional fluid discharge pump, after the cylinder is lowered by pressing the nozzle head, the pressing force of the nozzle head is released to raise the cylinder again. As the urging means, a metal coil spring is used. And this coil spring is normally arrange | positioned in the position which can contact a fluid.

[0004] For this reason, depending on the type of fluid, there is a problem that the metal coil spring is corroded.
Further, when such a fluid discharge pump is used in the field of cosmetics, the metal component may elute into the cosmetics from the coil spring, which is not preferable in terms of hygiene.

Further, such a fluid discharge pump is usually manufactured by molding a resin, but it is difficult to remove a metal coil spring when disposing of the fluid discharge pump. In addition, there arises a problem that recycling in consideration of separation becomes impossible.

Although it is not impossible to adopt a coil spring made of resin in order to solve such a problem, in such a case, it is necessary to obtain a sufficient urging force to make the fluid discharge pump function. Becomes difficult.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide a fluid discharge pump capable of effectively preventing corrosion and elution of a coil spring.

[0008]

According to the first aspect of the present invention, the fluid stored in the fluid storage unit is pressed by pressing a nozzle head disposed above the fluid storage unit. In a fluid discharge pump for discharging from a nozzle head, a cylinder disposed above the fluid storage unit, a piston that can reciprocate in the cylinder, and connecting the nozzle head and the piston. Thereby, a hollow connecting cylinder for transmitting the pressing force applied to the nozzle head to the piston to lower the piston, and for urging the piston upward through the connecting cylinder. The coil spring disposed on the outer peripheral portion of the connecting cylinder and the fluid stored in the fluid storage portion are caused to flow into the cylinder with the upward movement of the piston. And an outflow valve mechanism for allowing the fluid flowing into the cylinder to flow out to the nozzle head through the inside of the connecting cylinder with the lowering operation of the piston. It is characterized by the following.

According to a second aspect of the invention, there is provided the pump according to the first aspect, wherein the inflow valve mechanism is disposed near a lower end of the cylinder, and the cylinder is pressurized when the inside of the cylinder is pressurized. An opening communicating between the fluid reservoir and the cylinder formed near the lower end of the cylinder is closed, and the fluid reservoir formed near the lower end of the cylinder when the pressure inside the cylinder is reduced. First opening an opening communicating the cylinder with the cylinder
It consists of a valve mechanism.

According to a third aspect of the present invention, in the pump according to the second aspect, an inner surface of a lower end portion of the cylinder is formed in a tapered shape, and an outer surface of the first valve mechanism has an outer surface of the lower end portion of the cylinder. It has a tapered valve body that can be in close contact with the inner surface.

According to a fourth aspect of the present invention, in the second aspect of the invention, the first valve mechanism is provided on a support member movable in a vertical direction and on an outer peripheral surface of the support member. O-ring.

According to a fifth aspect of the present invention, in the first aspect of the present invention, the outflow valve mechanism separates the inside of the connecting cylinder from the cylinder by separating from the piston when the nozzle head is pressed. When the pressing force against the nozzle head is released, the opening communicating with the inside of the connecting cylinder is closed by closing the opening communicating with the inside of the connecting cylinder. It comprises a second valve mechanism.

According to a sixth aspect of the present invention, in the fifth aspect of the invention, the piston is formed of a resin packing.

According to a seventh aspect of the present invention, in the first aspect of the present invention, the outflow valve mechanism is disposed near an upper end of the connecting cylinder, and when the nozzle head is pressed, the outflow valve mechanism is provided. An opening communicating with the inside of the connecting cylinder and the nozzle head formed near the upper end of the nozzle head is opened, and is formed near the upper end of the connecting cylinder when the pressing force on the nozzle head is released. A second valve mechanism for closing an opening communicating between the inside of the connecting cylinder and the nozzle head is included.

According to an eighth aspect of the present invention, in the seventh aspect of the present invention, the second valve mechanism is pressed near its upper end by the nozzle head so as to be close to the upper end of the connecting cylinder. An opening communicating between the inside of the formed connection cylinder and the nozzle head is opened.

According to a ninth aspect of the present invention, in the eighth aspect of the invention, the second valve mechanism is disposed inside the nozzle head.

According to a tenth aspect of the present invention, in the seventh aspect of the invention, the second valve mechanism is provided on a support member movable in a vertical direction and on an outer peripheral surface of the support member. O-ring.

According to an eleventh aspect of the present invention, in the seventh aspect of the present invention, the second valve mechanism is formed near an upper end of the connecting cylinder using an urging force of the coil spring. An opening communicating between the inside of the connecting cylinder and the nozzle head is closed.

According to a twelfth aspect of the present invention, in the seventh aspect of the present invention, the outflow valve mechanism is disposed near a lower end portion of the connecting cylinder, and when the nozzle head is pressed, the outflow valve mechanism is provided. Opening an opening communicating with the inside of the cylinder and the inside of the connecting cylinder formed near the lower end of the connecting cylinder, and formed near the lower end of the connecting cylinder when the pressing force on the nozzle head is released. A third valve mechanism for closing an opening communicating between the inside of the cylinder and the inside of the connecting cylinder.

According to a thirteenth aspect of the present invention, in accordance with any one of the first to twelfth aspects, the fluid storage portion includes a hard cylinder member and the cylinder member with a decrease in the fluid. And a piston member moving in the direction of the nozzle head.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are longitudinal sectional views of a fluid container to which a fluid discharge pump 1 according to a first embodiment of the present invention is applied.

The fluid container may be a gel generally used as a gel used in the field of cosmetics, such as a hair gel or a cleansing gel, a cream-like substance such as a nutritional cream or a massage cream, or a cosmetic. It is used as a container for cosmetics for storing a liquid such as water. In this specification,
A liquid including a high-viscosity liquid, a semi-fluid, a gel or a cream in which a sol is solidified in a jelly state, and an ordinary liquid are referred to as a fluid.

This fluid container comprises a fluid discharge pump 1 according to the present invention, a nozzle head 2, an outer lid 3, and a fluid storage section 4 for storing a fluid therein.

Here, the nozzle head 2 has a discharge portion 11 for discharging the fluid, and a pressing portion 12 pressed when discharging the fluid. Further, the outer lid 3 is engaged with a screw portion formed at the upper end of the fluid storage portion 4 via a screw member 14.

The fluid storage section 4 has a cylindrical cylinder member 15, a piston member 16 which moves vertically in the cylinder member 15, and an outer lid 17 in which a plurality of ventilation holes 18 are formed. are doing. The cylinder member 15 and the fluid discharge pump 1 in the fluid storage section 4 are connected in a liquid-tight manner via a packing 19.

In this fluid container, the pressing portion 12 of the nozzle head 2 is pressed and reciprocated in the vertical direction, so that the fluid discharge pump 1 which will be described later in detail, operates the fluid container 4 so that The fluid stored in the nozzle head 2 is discharged from the discharge unit 11 of the nozzle head 2. Then, as the fluid in the fluid reservoir 4 decreases, the piston member 16 moves in the cylinder member 15 toward the nozzle head 2 as shown in FIG.

In this specification, the vertical direction in FIGS. 1 and 2 is defined as the vertical direction in the fluid container. That is, in the fluid container according to this embodiment, the nozzle head 2 side shown in FIG.
Let the piston member 16 side be the downward direction.

Next, the fluid discharge pump 1 according to the present invention
Will be described. FIGS. 3 to 5 are longitudinal sectional views showing the fluid discharge pump 1 and the nozzle head 2 according to the first embodiment of the present invention. 3 shows a state in which the fluid discharge pump 1 is left without applying a stress, and FIG. 4 shows a state in which the pressing portion 12 of the nozzle head 2 is pressed, and FIG. FIG. 5 shows a state where the two connecting cylinders 81 and 82 are descending together with the piston 83, and FIG. 5 shows a state where the first and second connecting cylinders 81 and 82 are rising together with the piston 83 when the nozzle head 2 is opened. Is shown. 3 to 5, only the second connecting cylinder 82 is hatched in order to clearly show the opening 91.

The fluid discharge pump 1 includes a cylinder 23
And a piston 83 that can reciprocate in the cylinder 23
By connecting the nozzle head 2 and the piston 83, the pressing force applied to the nozzle head 2 is reduced by the piston 8
The first and second hollow connecting cylinders 81 and 82, which are connected and fixed to each other and constitute a connecting cylinder for transmitting the piston 83 to lower the piston 83, and the second connecting cylinder 81 and 82 for urging the piston 83 in the ascending direction. 1. The coil spring 24 disposed on the outer periphery of the second connecting cylinders 81 and 82, and the fluid stored in the fluid storing section 4
An inflow valve mechanism composed of a first valve mechanism 86 for flowing the fluid into the cylinder 23 and the fluid flowing into the cylinder 23 to the piston 8
And an outflow valve mechanism including a second valve mechanism 87 for flowing out to the nozzle head 2 through the inside of the first and second connecting cylinders 81 and 82 in accordance with the descending operation of 3.

The piston 83 is composed of a pair of packings 84 and 85. These packing 8
Reference numerals 4 and 85 are made of, for example, a resin such as silicone rubber.

The above-described coil spring 24 is made of metal in order to obtain a strong urging force. However,
Since the coil spring 24 is provided on the outer peripheral portion of the connecting cylinder 21, it does not come into contact with the fluid passing through the inside of the connecting cylinder 21.

First valve mechanism 8 constituting the above-described inflow valve mechanism
When the inside of the cylinder 23 is pressurized, the opening 41 that connects the fluid reservoir 4 formed near the lower end of the cylinder 23 and the cylinder 23 is closed, and the inside of the cylinder 23 is depressurized. When this is done, the opening 41 is opened.

The first valve mechanism 84 has a tapered portion inclined at the same angle as the tapered inner surface of the lower end of the cylinder 23, and a resin valve having a stopper 88 attached to the lower end. A body 89 is provided. This first valve mechanism 8
In 6, when the inside of the cylinder 23 is pressurized, as shown in FIG. 4, the tapered portion of the valve body 89 comes into contact with the inner surface tapered portion of the lower end of the cylinder 23 to close the opening 41. When the pressure inside the cylinder 23 is reduced, as shown in FIG. 5, the tapered portion of the valve element 86 is separated from the inner surface of the lower end of the cylinder 23 to open the opening 41. At this time, the movement amount of the valve element 89 is regulated by the stopper 88 abutting on the lower end of the cylinder 23.

The stopper 88 is formed with a notch not shown. Therefore, as shown in FIG.
Even when the stopper 88 is in contact with the lower end of the cylinder 23, the fluid flows through the opening 41 at the lower end of the cylinder 23.
It is configured to be able to flow in from.

The second valve mechanism 8 constituting the above outflow valve mechanism
7 is separated from the piston 83 when the nozzle head 2 is pressed, so that the first and second connecting cylinders 81,
The passage connecting the inside of the cylinder 82 and the inside of the cylinder 23 is opened, and when the pressing force on the nozzle head 2 is released, the inside of the first and second connecting cylinders 81 and 82 is brought into contact with the inside of the first and second connecting cylinders 81 and 82. This is for closing a flow path communicating with the inside of the cylinder 23.

An opening 9 is provided below the cylindrical portion of the second connecting cylinder 82.
1 is drilled. On the outside of the opening 91, a convex portion 92 that can contact the concave portion of the packing 85 forming the cylinder 23 is formed. As shown in FIG. 4, in a state where the concave portion of the packing 85 constituting the cylinder 23 and the convex portion 92 of the second connecting cylinder 82 are separated from each other,
From the inside of the cylinder 23 through the opening 91, the first and second
A flow path reaching the inside of the connecting cylinders 81 and 82 is formed. On the other hand, as shown in FIGS. 3 and 5, in a state where the concave portion of the packing 85 constituting the cylinder 23 and the convex portion 92 of the second connecting cylinder 82 are in contact with each other, the first and second connecting portions are formed from the inside of the cylinder 23. The flow path reaching the inside of the cylinders 81 and 82 is closed.

Next, the operation of discharging the fluid by the fluid discharge container provided with the above-described fluid discharge pump 1 will be described.

In the initial state, as shown in FIGS. 1 to 3, the first and second connecting cylinders 81 and 82 connected to each other are urged upward by the action of the coil spring 24, The convex portion 92 formed at the lower end of the connecting cylinder 82 is in contact with the concave portion of the packing 85 forming the piston 83. Therefore, the flow path from the inside of the cylinder 23 to the inside of the first and second connecting cylinders 81 and 82 is closed. Also, due to the weight of the valve element 89, the tapered portion of the valve element 89 comes into contact with the inner surface tapered portion of the lower end of the cylinder 23, and
1 is closed.

In this state, when the pressing portion 12 of the nozzle head 2 is pressed, as shown in FIG.
First, the first and second connecting cylinders 81 and 82 descend relative to the piston 83. As a result, the convex portion 92 formed at the lower end of the second connecting cylinder 82 is separated from the concave portion of the packing 85 constituting the piston 83. Therefore, a flow path from the inside of the cylinder 23 to the inside of the first and second connecting cylinders 81 and 82 via the opening 91 is formed.

When the pressing portion 12 of the nozzle head 2 is further pressed, the lower end of the second connecting cylinder 81 and the piston 8
The piston 83 and the first and second connecting cylinders 81 and 82 come down integrally with each other while abutting on the upper surface of the packing 84 constituting the third cylinder 3. At this time, the inside of the cylinder 23 is pressurized, and the tapered portion of the valve body 89 is in close contact with the inner surface tapered portion of the lower end of the cylinder 23, so that the opening 41 is closed. For this reason, the pressurized fluid in the cylinder 23 flows through the opening 91 and the hollow first and second connecting cylinders 8.
The liquid flows out to the discharge section 11 of the nozzle head 2 via the nozzles 1 and 82 and is discharged from the discharge section 11.

After the piston 22 has moved down to the lower end of the stroke, if the pressing force applied to the nozzle head 2 is released, the first and second connecting cylinders 81 and 82 move against the piston 83 by the action of the coil spring 24. And rise relatively.
Thereby, as shown in FIG. 5, the convex portion 92 formed at the lower end portion of the second connecting cylinder 82 comes into contact with the concave portion of the packing 85 constituting the piston 83. For this reason, the cylinder 23
The flow path from the inside to the inside of the first and second connecting cylinders 81 and 82 is closed again.

Thereafter, by the action of the coil spring 24,
The nozzle head 2, the first and second connecting cylinders 81 and 82, and the piston 83 move up integrally. At this time, since the pressure inside the cylinder 23 is reduced, the tapered portion of the valve body 89 is separated from the tapered portion on the inner surface at the lower end of the cylinder 23, so that the opening 41 is opened and the notch formed in the stopper 88 is removed. The fluid flows into the cylinder 23 from the fluid storage unit 4 through the cylinder 23. Then, as shown in FIG. 5, when the piston 22 moves to the upper end of the elevating stroke, the elevating operation is stopped.

By repeating the above operation, the fluid stored in the fluid storage section 4 can be discharged from the nozzle head 2.

Next, another embodiment of the present invention will be described. 6 to 8 are longitudinal sectional views showing a fluid discharge pump 1 and a nozzle head 2 according to a second embodiment of the present invention.

FIG. 6 shows a state in which the fluid discharge pump 1 is left without applying stress.
7 shows a state in which the connecting tube 21 is being lowered together with the piston 22 by pressing the pressing portion 12 of the nozzle head 2, and FIG. 8 shows a state in which the connecting tube 21 is being opened by opening the nozzle head 2. The state in which it is rising together with the piston 22 is shown.

The fluid discharge pump 1 according to the second embodiment is also mounted on the upper part of the fluid storage unit 4 as in the case of the fluid discharge pump 1 according to the first embodiment shown in FIGS. You. The same members as those in the above-described first embodiment are denoted by the same reference numerals, and detailed description is omitted.

The fluid discharge pump 1 according to the second embodiment comprises a cylinder 23, a piston 22 reciprocable in the cylinder 23, a nozzle head 2 and a piston 22.
And a hollow connecting cylinder 21 for transmitting the pressing force applied to the nozzle head 2 to the piston 22 to lower the piston 22, and for urging the piston 22 in the upward direction. A coil spring 24 provided on the outer peripheral portion of the connecting cylinder 21 and a fluid stored in the fluid storage section 4
An inflow valve mechanism comprising a first valve mechanism 25 for flowing the fluid into the cylinder 23 and the fluid flowing into the cylinder 23 to the piston 2
A second and third valve mechanism 26 for flowing out to the nozzle head 2 through the inside of the connecting cylinder 21 with the descending operation of
27 is provided. Nozzle head 2
Is connected to the connecting cylinder 21 via the connecting member 13 and is detachable from the fluid discharge pump 1.

The nozzle head 2 and the connecting cylinder 21 are connected so as to be movable by a small distance in the vertical direction. An O-ring 31 for preventing liquid leakage is provided between the inner peripheral surface of the nozzle head 2 and the outer peripheral surface of the upper end of the connecting cylinder 21. Similarly, the connecting cylinder 21 and the piston 22 are movably connected to each other by a small distance in the vertical direction. An O-ring 32 for preventing liquid leakage is provided between the outer peripheral surface of the connecting cylinder 21 and the inner peripheral surface of the piston 22.

An O-ring 33 is disposed above the piston 22 on the outer peripheral surface of the connecting cylinder 21, and an O-ring 34 is disposed between the outer peripheral surface of the piston 22 and the inner peripheral surface of the cylinder 23. Has been established.

First valve mechanism 2 constituting the above-mentioned inflow valve mechanism
5, when the inside of the cylinder 23 is pressurized, the opening 41 that connects the fluid reservoir 4 formed near the lower end of the cylinder 23 and the cylinder 23 is closed, and the inside of the cylinder 23 is depressurized. When this is done, the opening 41 is opened.

The first valve mechanism 25 includes a resin-made support member 42 having an umbrella-shaped portion at its tip,
And an O-ring 43 disposed on the outer peripheral surface of the base end portion. In the first valve mechanism 25, when the inside of the cylinder 23 is pressurized, as shown in FIG. 7, the O-ring 43 comes into contact with the inner peripheral surface of the lower end of the cylinder 23 to open the opening 41. Close. When the pressure inside the cylinder 23 is reduced, the opening 41 is opened by the O-ring 43 being separated from the inner peripheral surface of the lower end of the cylinder 23 as shown in FIG. At this time,
The amount of movement of the O-ring 43 is regulated by the umbrella-shaped portion of the support member 42 abutting on the lower end of the cylinder 23.

Second valve mechanism 2 constituting the above outflow valve mechanism
6 is a connecting cylinder 21 when the nozzle head 2 is pressed.
For opening the opening 44 communicating with the inside of the connecting cylinder 21 and the nozzle head 2 formed near the upper end of the nozzle head 2 and closing the opening 44 when the pressing force on the nozzle head 2 is released. It is.

The second valve mechanism 26 is provided for the nozzle head 2
And a support member 45 attached inside the
And an O-ring 46 disposed on the outer peripheral surface of the O-ring. In the second valve mechanism 26, the nozzle head 2
7, when the supporting member 45 is moved by the pressing force, the O-ring 46 is separated from the inner peripheral surface of the upper end of the connecting cylinder 21 as shown in FIG.
Release 4. When the pressing force on the nozzle head 2 is released, as shown in FIG.
The opening 44 is closed by the O-ring 46 contacting the inner peripheral surface of the upper end portion of the connecting cylinder 21 by the movement of the support member 45 by the urging force of No. 4.

The second valve mechanism 26 includes a support member 45 provided inside the nozzle head 2 and an O-ring 46 provided on the outer peripheral surface of the support member 45 as described above. As shown in FIG. 9, similarly to the first valve mechanism 25 described above, a resin-made support member 52 having an umbrella-shaped portion at the distal end, and an outer peripheral surface of a base end of the support member 52, as shown in FIG. 9. May be used. In this case, when the nozzle head 2 is pressed, the support member 52 is pressed from its shape by the nozzle head 2.

Referring again to FIGS. 6 to 8, when the nozzle head 2 is pressed, the third valve mechanism 27 constituting the outflow valve mechanism includes a cylinder 23 formed near the lower end of the connecting cylinder 21. This is for opening the opening 47 that communicates the inside of the connecting cylinder 21 with the inside of the connecting cylinder 21 and closing the opening 47 when the pressing force on the nozzle head 2 is released.

The third valve mechanism 27 has an O-ring 48 provided on the outer peripheral surface of the lower end of the connecting cylinder 21. In the third valve mechanism 27, when the nozzle head 2 is pressed, as shown in FIG. 7, the connecting cylinder 21 moves down relative to the piston 22, and the O-ring 48 moves to the lower end of the piston 22. The opening 47 is opened by being separated from the valve seat formed in the opening. When the pressing force on the nozzle head 2 is released, as shown in FIG.
The connecting cylinder 21 rises relatively to the piston 22, and the O-ring 48 comes into contact with a valve seat formed at the lower end of the piston 22 to close the opening 47.

The above-mentioned O-rings 31, 32,
33, 34, 43, 46 and 48 are made of silicone rubber.

Next, the operation of discharging the fluid by the fluid discharge container provided with the above-described fluid discharge pump 1 will be described.

In the initial state, as shown in FIG.
Due to the action of the coil spring 24, the O-ring 46 is forcibly brought into contact with the inner peripheral surface of the upper end of the connecting cylinder 21, and the opening 44 is closed. Similarly, due to the action of the coil spring 24, the connecting cylinder 21 is relatively raised with respect to the piston 22, and the O-ring 48 comes into contact with the valve seat formed at the lower end of the piston 22, and the opening 47 Is closed.
The O-ring 43 is in contact with the inner peripheral surface of the lower end of the cylinder 23 by the weight of the O-ring 43 and the support member 42.

In such an initial state, since the two openings 44 and 47 are securely closed by the O-rings 46 and 48, the two openings 44 and 47 are stored in the fluid storage unit 4 due to a rise in the temperature of the fluid. Even when the fluid has a high pressure, it is possible to reliably prevent the fluid from being discharged from the nozzle head 2.

In this state, when the pressing portion 12 of the nozzle head 2 is pressed, as shown in FIG.
The nozzle head 2 descends relatively to the connecting cylinder 21. As a result, the O-ring 46 disposed on the outer peripheral surface of the support member 45 is separated from the inner peripheral surface of the upper end of the connecting cylinder 21 to open the opening 44.

When the pressing portion 12 of the nozzle head 2 is further pressed, the upper end of the connecting cylinder 21 and the nozzle head 2
And the connecting cylinder 21 and the nozzle head 2 descend integrally. Therefore, the connecting cylinder 21 descends relatively to the piston 22, and the O-ring 48
The opening 47 is opened by separating from the valve seat formed at the lower end of the opening 47.

The pressing portion 1 of the nozzle head 2
When the nozzle 2 is further pressed, the nozzle head 2 and the connecting cylinder 21 and the piston 22 are integrated with the upper end of the piston 22 being in contact with the O-ring 33 provided on the outer peripheral surface of the connecting cylinder 21. And descend. At this time, the cylinder 23
Is pressurized, and the O-ring 43 is
The opening 41 is closed by abutting on the inner peripheral surface of the lower end of 3. For this reason, the pressurized fluid in the cylinder 23 flows out to the discharge part 11 of the nozzle head 2 through the opening 47, the hollow connecting cylinder 21 and the opening 44, and is discharged from the discharge part 11. You.

When the pressing force applied to the nozzle head 2 is released after the piston 22 has moved down to the lower end of the stroke, the nozzle head 2 is raised relative to the connecting cylinder 21 by the action of the coil spring 24. At the same time, the connecting cylinder 21 moves up relative to the piston 22. Therefore, as shown in FIG. 8, in the second valve mechanism 26,
The opening 44 is closed by the O-ring 46 abutting on the inner peripheral surface of the upper end of the connecting cylinder 21, and the third valve mechanism 2
In 7, the opening 47 is closed by the O-ring 48 abutting on a valve seat formed at the lower end of the piston 22.

Thereafter, by the action of the coil spring 24,
The nozzle head 2, the connecting cylinder 21, and the piston 22 rise integrally. At this time, since the inside of the cylinder 23 is depressurized, the opening 41 is opened by separating the O-ring 43 from the inner peripheral surface of the lower end of the cylinder 23, and the fluid from the fluid storage unit 4 is stored in the cylinder 23. Inflow. Then, as shown in FIG. 8, when the piston 22 moves to the upper end of the up / down stroke, the ascent operation is stopped.

By repeating the above operation, the fluid stored in the fluid storage section 4 can be discharged from the nozzle head 2.

Next, still another embodiment of the present invention will be described. 10 to 12 show a third embodiment of the present invention.
It is a longitudinal section showing fluid discharge pump 1 concerning an embodiment with nozzle head 2. In these figures,
FIG. 10 shows a state in which the fluid discharge pump 1 is left without applying a stress, and FIG. 11 shows a state in which the connecting portion 21 is being lowered together with the piston 22 by the pressing portion 12 of the nozzle head 2 being pressed. And FIG.
Indicates a state in which the connecting cylinder 21 is rising together with the piston 22 when the nozzle head 2 is opened.

The fluid discharge pump 1 according to the third embodiment also includes the fluid discharge pump according to the first embodiment shown in FIGS. 1 and 2 and the fluid discharge pump according to the second embodiment shown in FIGS. 6 and 7. As in the case of the discharge pump 1, it is mounted on the upper part of the fluid reservoir 4. The same members as those in the first embodiment or the second embodiment described above are denoted by the same reference numerals, and detailed description thereof will be omitted.

In the above-described second embodiment, the first valve mechanism 25 using the O-ring 43 and the O-ring 4
6 and a second valve mechanism 26 utilizing the same. On the other hand, in the third embodiment, a first valve mechanism 63 using a spherical valve body 71 and a coil spring 72 for urging the valve body 71 in one direction, a spherical valve body 65 and this valve body 6
5 using a coil spring 66 that biases the coil 5 in one direction.
And the valve mechanism 63 of FIG.

That is, the first valve mechanism 63 constituting the inflow valve mechanism includes a spherical valve element 71 and a support member 69 for urging the valve element 71 toward the lower end of the cylinder 23 functioning as a valve seat. And a coil spring 72 supported by the coil spring 72. In the first valve mechanism 63, when the inside of the cylinder 23 is pressurized, the valve body 71 comes into contact with the inner peripheral surface at the lower end of the cylinder 23, as shown in FIG. Close. When the pressure inside the cylinder 23 is reduced, as shown in FIG. 12, the valve body 71 separates from the inner peripheral surface of the lower end of the cylinder 23 against the urging force of the coil spring 72, thereby opening the opening 41. .

The second valve mechanism 61 constituting the outflow valve mechanism includes a spherical valve body 65 and a support member 67 for urging the valve body 65 toward the upper end of the connecting cylinder 21 functioning as a valve seat.
And a coil spring 66 supported by the coil spring 66. In the second valve mechanism 61, when the nozzle head 2 is pressed, as shown in FIG. 11, the valve body 65 is separated from the inner peripheral surface of the upper end portion of the connecting cylinder 21 so that the opening 44
To release. When the pressing force against the nozzle head 2 is released, as shown in FIG. Is closed.

The above-described coil springs 66 and 72 are
Unlike the coil spring 24, it comes into direct contact with the fluid. Therefore, the coil springs 66 and 72 are made of resin. In this case, the coil springs 66 and 72 need only have an urging force capable of urging the valve bodies 65 and 71, and it is not necessary to obtain a large urging force unlike the coil spring 24. Even when used, there is no problem in function.

Next, the operation of discharging a fluid by the fluid discharge container provided with the fluid discharge pump 1 according to the third embodiment will be described.

In the initial state, as shown in FIG.
The opening 44 is closed, forcibly in contact with the inner peripheral surface of the upper end of the opening 1. Similarly, due to the action of the coil spring 24, the connecting cylinder 21 is relatively raised with respect to the piston 22, and the O-ring 48 comes into contact with the valve seat formed at the lower end of the piston 22, and the opening 47 Is closed. The valve body 71 is in contact with the inner peripheral surface of the lower end of the cylinder 23 by the action of the coil spring 72.

In this state, when the pressing portion 12 of the nozzle head 2 is pressed, the nozzle head 2 descends relatively to the connecting cylinder 21 as shown in FIG. As a result, the valve body 65 is pressed by the protrusion 64 attached inside the nozzle head 2, and the coil spring 66 is pressed.
The opening 44 is opened by separating from the inner peripheral surface of the upper end of the connecting cylinder 21 against the urging force of the connecting cylinder 21.

When the pressing portion 12 of the nozzle head 2 is further pressed, the upper end of the connecting cylinder 21 and the nozzle head 2
And the connecting cylinder 21 and the nozzle head 2 descend integrally. Therefore, the connecting cylinder 21 descends relatively to the piston 22, and the O-ring 48
The opening 47 is opened by separating from the valve seat formed at the lower end of the opening 47.

The pressing portion 1 of the nozzle head 2
When the nozzle 2 is further pressed, the nozzle head 2 and the connecting cylinder 21 and the piston 22 are integrated with the upper end of the piston 22 being in contact with the O-ring 33 provided on the outer peripheral surface of the connecting cylinder 21. And descend. At this time, the cylinder 23
Is pressurized, and the opening 41 is closed by the valve body 71 abutting on the inner peripheral surface of the lower end of the cylinder 23. For this reason, the pressurized fluid in the cylinder 23 flows through the opening 47, the hollow connecting cylinder 21 and the opening 4.
4, flows out to the discharge unit 11 of the nozzle head 2, and is discharged from the discharge unit 11.

As shown in FIG. 11, if the pressing force applied to the nozzle head 2 is released after the piston 22 has moved down to the lower end of the stroke, the nozzle head 2 is moved to the connecting cylinder 21 by the action of the coil spring 24. The connection cylinder 21 rises relatively to the piston 22 while rising relatively to the piston 22. For this reason, as shown in FIG. 12, in the second valve mechanism 61, the valve body 65 contacts the inner peripheral surface of the upper end portion of the connecting cylinder 21 to close the opening 44, and the third valve mechanism 61 At 27, the opening 47 is closed by the O-ring 48 abutting on the valve seat formed at the lower end of the piston 22.

Thereafter, by the action of the coil spring 24,
The nozzle head 2, the connecting cylinder 21, and the piston 22 rise integrally. At this time, since the pressure in the cylinder 23 is reduced, the valve body 71 is separated from the inner peripheral surface of the lower end of the cylinder 23 against the urging force of the coil spring 72, so that the opening 41 is opened. The fluid flows from the fluid storage unit 4 into the fluid. And FIG.
When the piston 22 moves to the upper end of the up-and-down stroke as shown in FIG.

By repeating the above operation, the fluid stored in the fluid storage section 4 can be discharged from the nozzle head 2.

[0081]

According to the first or second aspect of the present invention, since the contact between the fluid and the coil spring for raising the piston can be prevented, a metal coil spring having a large urging force can be prevented. In the case where is used, corrosion of the coil spring and elution of the metal component can be effectively prevented. Further, even when the fluid discharge pump is discarded, the metal coil spring can be easily removed.

According to the third to sixth aspects of the present invention, each opening can be reliably closed to prevent leakage of the fluid, while having a simple and inexpensive configuration.

According to the present invention, it is possible to minimize the amount of fluid remaining in the fluid discharge pump after passing through the second valve mechanism.

According to the tenth aspect of the present invention, it is possible to prevent leakage of the fluid by reliably closing the opening while having a simple and inexpensive configuration.

According to the eleventh aspect, the second valve mechanism communicates the inside of the connecting cylinder formed near the upper end of the connecting cylinder with the nozzle head by using the urging force of the coil spring. Since the opening is closed, the opening can be reliably closed even when using a high-viscosity liquid, semi-liquid, or gel or cream with a sol solidified into a jelly as a fluid. Becomes

According to the twelfth aspect of the present invention, even when pressure is applied to the fluid stored in the fluid storage section by the action of the first valve mechanism and the third valve mechanism, the flow rate can be reduced. The outflow of the body can be more effectively prevented.

According to the thirteenth aspect of the present invention, a highly airtight fluid having a hard cylinder member and a piston member moving in the direction of the nozzle head in the cylinder member as the fluid decreases. The present invention can be applied to a fluid container having a body storing section.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a fluid container to which a fluid discharge pump 1 according to a first embodiment of the present invention is applied.

FIG. 2 is a longitudinal sectional view of a fluid container to which the fluid discharge pump 1 according to the first embodiment of the present invention is applied.

FIG. 3 is a longitudinal sectional view showing a fluid discharge pump 1 according to the first embodiment of the present invention together with a nozzle head 2.

FIG. 4 is a longitudinal sectional view showing a fluid discharge pump 1 according to the first embodiment of the present invention together with a nozzle head 2.

FIG. 5 is a longitudinal sectional view showing a fluid discharge pump 1 according to the first embodiment of the present invention together with a nozzle head 2.

FIG. 6 is a longitudinal sectional view showing a fluid discharge pump 1 according to a second embodiment of the present invention together with a nozzle head 2.

FIG. 7 is a longitudinal sectional view showing a fluid discharge pump 1 according to a second embodiment of the present invention together with a nozzle head 2.

FIG. 8 is a longitudinal sectional view showing a fluid discharge pump 1 according to a second embodiment of the present invention together with a nozzle head 2.

FIG. 9 is a longitudinal sectional view showing a modified example of the fluid discharge pump 1 according to the second embodiment of the present invention, together with a nozzle head 2.

FIG. 10 is a longitudinal sectional view showing a fluid discharge pump 1 according to a third embodiment of the present invention together with a nozzle head 2.

FIG. 11 is a longitudinal sectional view showing a fluid discharge pump 1 according to a third embodiment of the present invention together with a nozzle head 2.

FIG. 12 is a longitudinal sectional view showing a fluid discharge pump 1 according to a third embodiment of the present invention together with a nozzle head 2.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fluid discharge pump 2 Nozzle head 3 Outer lid 4 Fluid storage part 11 Discharge part 12 Pressing part 13 Connecting member 14 Screw member 15 Cylinder member 16 Piston member 21 Connecting cylinder 22 Piston 23 Cylinder 24 Coil spring 25 First valve mechanism 26 Second valve mechanism 27 Third valve mechanism 41 Opening 42 Supporting member 43 O-ring 44 Opening 45 Supporting member 46 O-ring 47 Opening 48 O-ring 52 Supporting member 53 O-ring 61 Second valve mechanism 63 First Valve mechanism 64 protruding portion 65 valve body 66 coil spring 71 valve body 72 coil spring 81 first connection tube 82 second connection tube 83 piston 84 packing 85 packing 86 first valve mechanism 87 second valve mechanism 88 stopper 89 valve body 91 Opening 92 Convex

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Claims (13)

[Claims] 1. A fluid discharge pump for discharging a fluid stored in the fluid reservoir from the nozzle head by pressing a nozzle head disposed above the fluid reservoir. A cylinder disposed above the fluid storage unit, a piston reciprocating in the cylinder, and connecting the nozzle head and the piston to reduce the pressing force applied to the nozzle head. A hollow connecting cylinder for transmitting the piston to lower the piston, and a coil spring disposed on an outer peripheral portion of the connecting cylinder for urging the piston in a direction to raise the piston via the connecting cylinder And an inflow valve mechanism for causing the fluid stored in the fluid storage unit to flow into the cylinder along with the upward movement of the piston; and An outlet valve mechanism for causing the inflowing fluid to flow out to the nozzle head through the inside of the connecting cylinder as the piston descends. 2. The fluid discharge pump according to claim 1, wherein the inflow valve mechanism is provided near a lower end of the cylinder, and is provided near a lower end of the cylinder when the inside of the cylinder is pressurized. While closing the opening communicating the formed fluid storage portion and the cylinder, when the inside of the cylinder is depressurized, the fluid storage portion and the cylinder formed near the lower end of the cylinder are closed. A fluid discharge pump comprising a first valve mechanism for opening a communicating opening. 3. The fluid discharge pump according to claim 2, wherein an inner surface of a lower end of the cylinder is formed in a tapered shape, and an outer surface of the first valve mechanism can be in close contact with an inner surface of the lower end of the cylinder. A fluid discharge pump having a tapered valve body. 4. The fluid discharge pump according to claim 2, wherein the first valve mechanism includes a support member movable in a vertical direction and an O-ring provided on an outer peripheral surface of the support member. Having a fluid discharge pump. 5. The fluid discharge pump according to claim 1, wherein the outflow valve mechanism separates the inside of the connecting cylinder and the inside of the cylinder by separating from the piston when the nozzle head is pressed. A second valve that opens the communicating opening and closes the opening that connects the inside of the connecting cylinder and the inside of the cylinder by contacting the piston when the pressing force on the nozzle head is released. Fluid discharge pump composed of a mechanism. 6. The fluid discharge pump according to claim 5, wherein the piston is made of resin packing. 7. The fluid discharge pump according to claim 1, wherein the outflow valve mechanism is disposed near an upper end of the connecting cylinder, and near an upper end of the connecting cylinder when the nozzle head is pressed. An opening communicating with the inside of the connection cylinder and the nozzle head formed in the opening is opened, and when the pressing force on the nozzle head is released, the connection cylinder formed near the upper end of the connection cylinder is released. A fluid discharge pump including a second valve mechanism for closing an opening communicating between the inside and the nozzle head. 8. The fluid discharge pump according to claim 7, wherein the second valve mechanism is formed near an upper end of the connecting cylinder by being pressed from above by the nozzle head. A fluid discharge pump for opening an opening communicating between the inside of the connecting cylinder and the nozzle head. 9. The fluid discharge pump according to claim 8, wherein the second valve mechanism is provided inside the nozzle head. 10. The fluid discharge pump according to claim 7, wherein the second valve mechanism comprises: a support member movable in a vertical direction; and an O-ring provided on an outer peripheral surface of the support member. Having a fluid discharge pump. 11. The fluid discharge pump according to claim 7, wherein the second valve mechanism utilizes an urging force of the coil spring to form an inside of the connection cylinder formed near an upper end of the connection cylinder. A fluid discharge pump for closing an opening communicating with the nozzle head. 12. The fluid discharge pump according to claim 7, wherein the outflow valve mechanism is provided near a lower end of the connecting cylinder, and near the lower end of the connecting cylinder when the nozzle head is pressed. Along with opening an opening communicating between the inside of the cylinder and the inside of the connecting cylinder formed in the cylinder, when the pressing force on the nozzle head is released, the cylinder formed near the lower end of the connecting cylinder is closed. A third for closing an opening communicating between the inside and the inside of the connecting cylinder.
Fluid discharge pump including the valve mechanism of (1). 13. The fluid discharge pump according to claim 1, wherein the fluid storage section includes a hard cylinder member and the nozzle inside the cylinder member as the fluid decreases. A fluid discharge pump comprising: a piston member moving in a head direction.